JPS5919770B2 - Extrudate cooling method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves cooling the extrudate immediately after the hot extrusion operation;
and to a method and apparatus for cooling an extrudate used for handling the extrudate during its cooling.

In general, for example in the production of tubing and other hot extruded materials consisting of hot extrusions of copper materials, it is highly desirable, for metallurgical or other reasons, to cool the extrudates immediately after the extrusion operation. .

One method for accomplishing this purpose is underwater extrusion.

In this system, the extrudate is placed in and passed through a water bath immediately after leaving the extrusion press.

In conventional manufacturing operations, the extrudate is passed through cooling pipes located between the extrusion press and a cooling tank (water tank) to a cooling tank located on the exit side of the extrusion press.

In this configuration, the extrudate had to be passed from the die to the platen prior to performing the cooling operation.

In some applications, this delay in applying refrigerant to the extrudate has not produced the desired results, either from a metallurgical standpoint or from a standpoint of minimizing oxidation.

Another problem with the conventional underwater cooling structure mentioned above is that
This occurs regarding the removal of small cracked extrudates from the cooling tubes and the control of water in the cooling tubes and cooling tank for periods of press downtime.

If extrudate cracking occurs, it is important for efficient operation that it be removed quickly from the cooling tubes.

One consideration is therefore to remove water from the cooling tubes while simultaneously preventing water from flowing from the cooling tank into the cooling tubes.

This is because the water level in the cooling tank is normally maintained above the lower inner surface of the cooling pipe.

An additional problem with conventional designs for controlling water between and within the cooling tubes and the cooling tank concerns the downtime of the extrusion press, during which water flows from the cooling tank into the cooling tube. It is desirable to prevent this.

Still other problems with conventional submersible cooling techniques relate to the structure of the mechanism for receiving, supporting, and transferring the extrudate from the cooling tubes, where it is difficult to move the mechanism. At least some of the components are mounted inside the cooling tank and thus in the water.

The present invention eliminates these and other disadvantages of conventional underwater extrusion techniques.

More particularly, one object of the present invention is to provide a submerged method of hot extrudates in which the extrudate is cooled while it is in the platen of an extrusion press immediately after it leaves the die of the extrusion press. The object of the present invention is to provide control and handling methods and devices.

Another object of the invention is a cooling tube disposed between an extrusion press and a cooling tank for receiving and receiving hot extrudates and having two cooperating nozzles at each end thereof, comprising: one of the nozzles is arranged to rapidly cool the hot extrudate immediately after it leaves the die of the extrusion press;
and can supply a sufficiently high strength and amount of refrigerant for rapid cooling of the extrudate, and the other nozzle, in addition to further cooling the extrudate, allows water to flow from the cooling tank into the cooling pipe. It is an object of the present invention to provide a cooling pipe which is arranged so as to be able to prevent the refrigerant from flowing into the cooling pipe and which can supply a refrigerant.

Yet another object of the invention is a cooling tube arranged between an extrusion press and a cooling tank for receiving and taking up hot extrudates and having two cooperating nozzles at each end thereof, comprising: While the cracked extrudate is between the extrusion press and the cooling tank, the nozzles remote from the cooling tank are deactivated, and the nozzles closest to the cooling tank are emptied by drawing water from the cooling tubes. It is an object of the present invention to provide a cooling pipe which is configured to continue operating in such a manner as to prevent water from flowing into the cooling pipe from the water tank.

Yet another object of the present invention is to configure at least a portion of the cooling tube so that it can be opened quickly to remove broken extrudate within the cooling tube once the water in the cooling tube has been drained.

Yet another object of the present invention is to provide a selectable sealing structure to prevent water from flowing from the cooling tank into the cooling tubes when the extrusion press is not operating.

Yet another object of the invention is to receive, support and transfer the extrudate from the cooling tube, all but the extrudate contacting member being located outside the cooling tank. The purpose of this invention is to provide a run-out type table mechanism.

These and other objects, features and advantages of the present invention will become more apparent from the following description of the preferred embodiments, taken in conjunction with the accompanying drawings.

Referring to FIGS. 1A and 1B, a portion of the platen 10 of a hot extrusion press is shown, with the extrudate E passing from a die (not shown) located to the left of the platen 10. It passes through and into the opening 12 .

An inlet end of a cooling pipe 14 is installed within the opening 12;
This cooling pipe 14 penetrates the entire length inside the platen 10 at one end, and has a cooling tank (water tank) at the other end.
It extends into 16.

The extrudate E shown in broken lines is supported by a run-out table 18 and transferred from the cooling pipe 14 to the cooling tank 16 .

The run-out table 18 is advanced by the carriage 20 in the axial direction of the extrudate E movement path.

At the right end of FIG. 1B is a table 18 and a carriage 20.
The rightmost part of is shown.

A more detailed explanation of the cooling pipe 14, table 18, and carriage 20 will be provided later.

2A and 2B and 3A and 3B, the structure of the cooling tube 14 is shown in more detail.

FIG. 3A shows the pressed end of the cooling tube 14 extending into the platen 10 and in this region the cooling tube 14 is constructed in the form of an outer fastening member 22 and an inner tubular member 24.

The first portion of the tubular member 24 takes the form of a fixation portion 26 attached to the outer fixation member 22 by a fixation and support collar 28 .

Between the inner end of portion 26 and an adjacent portion of tubular member
There is a section 30, and the two sections 26 and 30 are the nozzle 32.
It has a separation part or gap that forms a

The portion 30 is supported on the outer fixing member 22 by standoff collar members 34 and 36, which is also a sealing member, and receives in its outer portion several threaded ronds 38, each having a lug 40. and for each lug 40, two nuts 42 are located on each side of the lug 40.

The entire assembly shown in Figure 3A is bolted to the plate 44.
is supported by the platen 10.

Section 30 simply unscrews all the nuts 42 on one side of lug 40 and tightens section 30 onto nut 42 on the other side of lug 40.
By simply lifting the nozzle 32 to the left or right with all of its components, its axial direction is adjusted to adjust the opening of the nozzle 32 and thus the amount of water.

All nuts 42 are then tightened to maintain the adjusted nozzle position.

In FIG. 3A, portion 30 is shown in its rightmost position, and thus nozzle 32 is shown in its maximum open position.

The refrigerant (in this example water) is supplied to a nozzle 32, as best shown in FIG. The extrudate E is fed into the interior of the cooling pipe 14 for cooling by a pipe 44 .

FIG. 3A shows an internal passageway 48 of collar 46 from which water flows into the interior of cooling tube 14 in close proximity to the die side of platen 10.

2B and 3B, the other end of the cooling tube 14 is shown, with the second nozzle 50 located in close proximity to the inlet end of the water tank 16, best shown in FIG. 1A. has been done.

Since the structure of this nozzle 50 is very similar to the structure of the nozzle 32, description of the constituent members of the nozzle 50 will be omitted.

As seen in FIG. 2B, collar 52 and supply pipe 54 supply water to nozzle 50 and adjustable mechanism 58.

This end of the cooling pipe 14 is carried by a support 57 forming part of the cooling tank 16.

Nozzle 50 has three functions, one of which is that nozzle 50 increases the cooling capacity of nozzle 32.

Second, nozzle 50 prevents water from flowing back out of the tank through cooling tube 14.

The cooling tube 14 is open at its press end so that water from the cooling tank 16 would otherwise flow back through the cooling tube 14 into contact with hot extrusion tooling, such as a die or container.

Third, the nozzle 50 is used to empty the cooling tube 14 of water when opening the central portion of the cooling tube 14.

One of the features of the invention is the construction of the middle section of the cooling tube 14, which allows for the rapid removal of broken extrudates from the cooling tube 14.

FIGS. 2A, 2B, 3A and 3B, along with FIG. 4, best illustrate this structure.

The central portion 58 of the cooling tube 14 is made of two semi-cylindrical members, more specifically an upper member 60 and a lower member 62.

As shown in FIG. 4, members 60 and 62 have a bracket 64 on the outside thereof which is pivotally attached to a stand 68 by a common pin 66. As shown in FIG.

Such a construction allows the two members 60 and 62 to be completely removed from position around the extrudate E.

This is further facilitated by the fact that members 60 and 62 are joined together by a number of swing bolts 70 on either side of them, which swing bolts 70 are arranged as shown in FIGS. 3A and 3B. The nut 74 is pivotally connected to the lower member 62 and extends into a slot formed in the upper member 60 in its retained position, with a nut 74 holding the members 60 and 62 on either side as shown in FIGS. 2A and 3A. Used for fixing.

Gasket 67 minimizes water leakage between upper member 60 and lower member 62.

To separate members 60 and 62, nut 74 may be loosened just enough to allow them to swing downwardly.

Referring to FIGS. 3A and 3B, collar members 61 are shown as part of the central section 58 of the cooling tube 14, disposed on each end of the central section 58.

These collar members 61 are also divided into two parts, similar to the members 60 and 62 to which they are welded.

Collar member 61 is provided with a similar rocking bolt 70 and serves only as a coupling between axially movable tubular member 24 and rockable members 60 and 62.

A pair of bundles 76 attached to each of the upper and lower members 62 and 62 are provided to enable movement of the members 60 and 62 from an operative position to an inoperative position.

The gate structure provided between the cooling tank side end of the cooling pipe 14 and the cooling tank 16 will be explained. This structure is shown in FIGS. 1A and 3B.

Normally, the water level in the cooling tank 16 is maintained above the horizontal centerline of the cooling tube 14, so that, if not prevented, water from the cooling tank 16 will flow into the cooling tube 14 and from there. It will flow into the hot extrusion tooling during normal operation of the extrusion press.

This may occur even during times when the extrusion press is not operating.

Cooling tank 1 when the extrusion press is not operating
A gate mechanism 78 is provided between the cooling tank 16 and the cooling tube 14 to eliminate water loss from the cooling tank 16 .

The gate mechanism 78 includes a vertically disposed member 80 having dimensions sufficient to exceed the diameter of the feed end of the cooling tube 14 and having a diameter on the cooling tube 14 side.
A sealing gasket 82 is provided in sealing relationship with a backing plate 84 mounted on the support 57 for the cooling tube 14.

Member 80 is shown in a sealed position in FIG. 3B and is raised and lowered by piston-cylinder assembly 86 shown in FIG. 1A.

Referring now to the run-out table 18 and its carriage 20, these are shown in FIGS. 1A, 1B and 5.

First of all, as noted in FIGS. 1A and 1B, the length of the runout type table 18 is approximately equal to that of the cooling pipe 1.
4 is smaller than the corresponding length of the cooling tank 16 by a length of 4.

In other words, table 18 is configured to advance away from cooling tube 14 a distance sufficient to move a portion of extrudate E within cooling tube 14 to cooling tank 16 .

FIG. 5 shows that the run-out table 18 includes several sets of spaced apart arms 88.

- Force, each set of arms 88 is made up of an upper member 90 and a lower member 92.

A lower member 92 is attached to a pivot shaft 94 and connected by a bracket 96 to a piston-cylinder assembly 98 that is connected to the lower member 92 so that the extrudate E can fall to the bottom of the water tank 16. is rotated away from the upper member 90.

5, arm 88, and particularly its lower member 92, is coaxially aligned with cooling tube 14 so that extrudate E remains submerged as it enters platen 10.

The necessary adjustments for the lower member 92 and the control of its movement are performed by an adjustment stop mechanism 100 shown in FIG.

Apart from the lower part of the set of arms 88 of the run-out table 18, the rest of the structure is located outside the cooling tank 16 and more importantly outside the water.

FIG. 5 shows pivot shaft 94 and piston-cylinder assembly 98 carried by support beam 102 of carriage 20. FIG.

- this support beam 102 is carried by a number of freely rotatable wheels 104 which run on rails 106 and are properly maintained by several guiding mechanisms 108;

As shown in FIG. 1B, the carriage 20, and therefore the runout table 18, is moved toward and away from the cooling tube 14 by the piston-cylinder assembly 110.

Turning now again to FIG. 1A, specifically the section showing the water system for nozzles 32 and 50, each nozzle 32.50
The inlet tube 112 for each collar 46 is shown.

These inlets 112 are fed by individually controlled pumps 114 with motors 116 controlled by scooters 118, while the starter 118 is controlled from the operator's pull bit.

The pump 114 receives the refrigerant, i.e. water, from a pipe 122 leading to the cooling tank 16, so that the water system forms a closed loop system, with water from the pump 114 being routed from the cooling pipe 14 to the cooling tank 16 and from there into the cooling tank 16. is returned to pump 114.

Since the operating conditions of nozzles 32 and 50 are different, nozzle 32
Pump 114 and motor 116 for nozzle 50 are configured to provide water at a greater pressure than pump 114 and motor 116 for nozzle 50 .

The main function of the nozzle 32 is to rapidly cool the hot extrudate E as soon as it leaves the die, and for this reason, according to the invention, the nozzle 32 is placed in close proximity to the die within the platen 10. attached.

In order to obtain the desired cooling rate, the refrigerant (water) supplied by the nozzle 32 must have a strength and quantity high enough to force it continuously through the vapor generated by the contact of the water with the hot extrudate E. Must have.

The operating conditions for nozzle 50 are less stringent.

The strength and amount of refrigerant (water) supplied from nozzle 50 is such that it provides additional water and prevents water from cooling tank 16 from flowing into cooling tubes 14 when the extrusion press is operating. sufficient to contain and thereby protect the hot extrusion tooling from the tank water and to draw water from the cooling pipe 14 into the cooling tank 16 in the second case where there is a cracked extrudate. That's fine.

Briefly describing the method of the present invention, assuming that the water system for cooling tube 14 and cooling tank 16 is operative to receive extrudate E, extrudate E is separated from the die. Immediately after entering the platen 10, it is cooled, and then passes through water and is cooled by a nozzle 50 until it reaches the cooling tank 16.

This ensures that the benefits of rapid and controlled cooling after extrusion are optimized.

Such cooling is mainly achieved by the nozzle 32 due to its location, strength, and water volume, but it is also possible to prevent water from flowing into the cooling pipe 14 from the cooling tank 16 to prevent hot extrusion tools. It is also obtained by a nozzle 50 which operates in a protective manner.

During operation of the extrusion press, the extrudate E is completely submerged in water from the time it enters the platen 10, and the extrudate E is completely submerged in the cooling tank 1.
It will be seen that it remains in that state until it leaves 6.

In the event that cracked extrudates are present in the cooling tube 14, lowering the gate mechanism 78 and quickly removing water from the cooling tube 14 and height differences in the water level in the cooling tank 16. cooling pipe 1 from the cooling tank 16 which may occur due to
When it is not possible to prevent water from entering 4, the first nozzle 32 is shut off and the nozzle 50 continues to operate.

Therefore, the structure and arrangement of the nozzle 50 and the nozzle 5
The pressure and amount of water ejected from the cooling tube 14 displaces water from the cooling tube 14 and forces the water into the cooling tank 16 while at the same time the water flows from the cooling tank 16 into the cooling tube 14.
It is designed to prevent it from flowing into the body.

Once the water is emptied from the cooling tube 14 in this way (which can be done very quickly), the central portion 58 of the cooling tube 14 can be quickly separated and the exposed portion of the extrudate is , can be quickly removed by a stripping operation involving cutting one or more portions of the extrudate.

When the extrusion press is not operating and it is desired that no loss of water from the cooling tank 16 occurs due to water flowing into the cooling tube 14, the gate mechanism 78 is lowered and the water flows into the cooling tank 16. It is sealed to prevent it from flowing into the cooling pipe 14.

Although the best embodiment of the present invention has been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the present invention.

[Brief explanation of drawings]

1A and 1B include features of the present invention and include a schematic of a refrigerant supply system for cooling pipes and cooling tanks;
Figures 2A and 2B are continuous plan views of a submersible cooling system for hot extrudates; 3B is a continuous partial sectional view of the cooling pipe shown in FIGS. 2A and 2B, FIG.
FIG. 3 is an enlarged elevational view of the run-out table mechanism shown in FIG. 10...Platen, 14...Cooling pipe,
16... Cooling tank, 18... Table, 20... Carriage, 22... Fixed member, 24... Tubular member, 32...・・・・・・
Nozzle, 50... Nozzle, E... Extrudate.

Claims (1)

[Scope of Claims] 1. In a method for cooling an extrudate in which a hot extrudate extruded from a die is guided through a cooling pipe to a cooling tank, the hot extrudate extruded from the die is rapidly cooled at a position near the die in the cooling pipe. injecting sufficient refrigerant into the hot extrudate to cool the hot extrudate at a location proximate the cooling tank in the cooling tube and preventing backflow of refrigerant from the cooling tank into the cooling tube. A method for cooling an extrudate, characterized by spraying the extrudate into a liquid. 2. The method for cooling an extrudate according to claim 1, wherein the refrigerant injected into the hot extrudate near the cooling tank is injected in the direction of the moving force of the hot extrudate. 3. In an extrudate cooling device comprising a platen disposed immediately after the die, a cooling tank filled with a refrigerant, and a cooling pipe extending between the cooling tank and the platen, A nozzle 32 is provided in the cooling pipe of the toilet, which is formed by opposing tubular members 26 and 30 with a gap in between, and a nozzle 32 is provided in the cooling pipe near the cooling tank, which is formed by having tubular members facing each other with a gap in between. nozzle 50
A cooling device for an extrudate, characterized in that it is provided with: 4. The extrudate cooling device according to claim 3, wherein the opening degree of the nozzle 32.50 is adjustable. 5. The extrudate cooling device according to claim 3, wherein at least a portion of the cooling pipe can be divided in the radial direction. 6. The extrudate cooling device according to claim 5, wherein the cooling pipe is divided into two parts in the radial direction, and each of the divided parts 60 and 62 is pivotally connected at one end in the circumferential direction. .